公开(公告)号：US09064528B1

公开(公告)日：2015-06-23

申请号：US13927996

申请日：2013-06-26

申请人： Western Digital Technologies, Inc.

发明人： Alexander Krichevsky ,  Christopher B. Wolf

IPC分类号： G11B11/00 ,  G11B11/105

CPC分类号： G11B11/10576 ,  G11B5/314 ,  G11B5/6088 ,  G11B11/10536 ,  G11B2005/0021

摘要： A heat-assisted magnetic recording (HAMR) head is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The HAMR head includes a slider coupled with the laser and a HAMR transducer coupled with the slider. The HAMR transducer includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and an interferometric waveguide (IWG) optically coupled with the laser. The IWG includes a splitter, a recombination region and arms between the splitter and the recombination region. The arms have multiple optical path lengths. The IWG is configured to provide the energy from the laser to the media by forming an interference pattern in the recombination region. An antinode of the interference pattern is at a region of the media and heats the region of the media for a write operation.

摘要翻译： 热辅助磁记录（HAMR）头与用于提供能量的激光器耦合并且具有配置为在使用期间驻留在介质附近的空气轴承表面（ABS）。 HAMR头包括与激光器耦合的滑块和与滑块耦合的HAMR换能器。 HAMR传感器包括写入磁极的区域的写入极，用于激励写入极的线圈和与激光器光耦合的干涉波导（IWG）。 IWG包括分离器，复合区域和分离器与复合区域之间的臂。 臂具有多个光路长度。 IWG被配置为通过在复合区域中形成干涉图案将激光器的能量提供给介质。 干涉图案的波腹位于介质的区域，并加热介质的区域进行写入操作。

公开(公告)号：US07548495B2

公开(公告)日：2009-06-16

申请号：US11085418

申请日：2005-03-21

申请人： Shinya Kobayashi

发明人： Shinya Kobayashi

IPC分类号： G11B5/09 ,  G11B7/00 ,  G11B7/24 ,  G11B19/00 ,  G11B20/10 ,  G11B27/22

CPC分类号： G11B7/094 ,  G11B7/00458 ,  G11B7/0945 ,  G11B11/10576

摘要： A write retry processing unit repeats a write retry operation of a write and a verify, while performing a setting change of a focus offset for recording a data on an optical storage medium in case a verify error occurs in executing the write and a verify try fails. A learning processing unit retains a sum total of the number of adding times of the successful focus offset and the number of subtracting times of the successful retry offset as a learning result at the successful time of the write retry, and a write condition changing unit changes the focus offset setting value of the default so as to be drawn near to the latest focus offset which succeeds in the retry when the absolute value of the learning result retained in the learning processing unit is equal to or more than a threshold value.

摘要翻译： 写入重试处理单元重复写入和验证的写入重试操作，同时在执行写入时发生验证错误并且验证尝试失败的同时执行用于在光学存储介质上记录数据的聚焦偏移的设置改变 。 学习处理单元在写入重试的成功时间期间保持成功聚焦偏移的加法次数与成功重试偏移的减法次数的合计值作为学习结果，并且写入条件改变单元改变 当学习处理单元中保留的学习结果的绝对值等于或大于阈值时，将其设置为接近在重试中成功的最新对焦偏移附近的焦点偏移设置值。

公开(公告)号：US07319644B2

公开(公告)日：2008-01-15

申请号：US11494565

申请日：2006-07-28

申请人： Noriaki Nishi

发明人： Noriaki Nishi

IPC分类号： G11B7/085

CPC分类号： G11B11/10543 ,  G11B7/00718 ,  G11B7/0912 ,  G11B7/123 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13927 ,  G11B7/1398 ,  G11B11/10576

摘要： An optical head in which focusing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetector device. The spot shape correcting unit corrects part or all of light spots formed on the photodetector by a light beam reflected back by the optical disc so that the spot diameter in a direction traversing a track on the optical disc will be larger than the spot diameter along the track.

摘要翻译： 一种光头，其中通过用于在光盘上记录和/或再现信息信号的光斑尺寸方法来检测聚焦误差。 光头包括用于校正物镜和光电检测器件之间的斑点形状的单元。 斑点形状校正单元通过由光盘反射回的光束校正在光电检测器上形成的光点的一部分或全部，使得沿着光盘上的轨道的方向上的光斑直径将大于沿着光盘的光点直径 跟踪。

公开(公告)号：US20070230022A1

公开(公告)日：2007-10-04

申请号：US11486307

申请日：2006-07-13

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/5582 ,  G11B5/58 ,  G11B7/0946 ,  G11B11/10576

摘要： A disk device has a positioning control system which has a disturbance suppression function in which the disturbance is suppressed quickly to prevent vibration of the head. In a positioning system having a disturbance suppression function of a disk device, an interface circuit for setting a known disturbance frequency to an initial value from the outside is installed. An unknown disturbance frequency can be immediately suppressed, or disturbance frequency control can be started from a known disturbance frequency, and even if the frequency changes thereafter, the estimated frequency can follow up to the disturbance, and the vibration of the head can be quickly prevented.

摘要翻译： 磁盘装置具有具有干扰抑制功能的定位控制系统，其中快速抑制扰动以防止磁头的振动。 在具有盘装置的干扰抑制功能的定位系统中，安装用于将已知的干扰频率从外部设定为初始值的接口电路。 可以立即抑制未知的干扰频率，或者可以从已知的干扰频率开始扰动频率控制，并且即使其后的频率变化，估计的频率也可以跟随干扰，并且可以快速地防止头部的振动 。

公开(公告)号：US07230902B2

公开(公告)日：2007-06-12

申请号：US10714866

申请日：2003-11-18

申请人： Kimihiro Saito ,  Tsutomu Ishimoto

发明人： Kimihiro Saito ,  Tsutomu Ishimoto

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G02B27/283 ,  G11B7/09 ,  G11B7/1356 ,  G11B7/1381 ,  G11B7/1387 ,  G11B11/10532 ,  G11B11/10576 ,  G11B2007/13727

摘要： An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL), the objective lens having a numerical aperture greater than 1, a beam splitter 102 for reflecting both of a p-polarized light component and an s-polarized light component of reflected lights from an optical recording medium when the optical pickup device irradiates the optical recording medium with a bundle of rays in a predetermined polarized state from a light source through the objective lens to detect a component in the polarized state perpendicular to the polarized state of reflected light obtained when a distance between the surface of this optical recording medium and the flat surface portion of the solid immersion lens (SIL) is zero to produce a signal corresponding to the distance between the surface of the optical recording medium and the flat surface portion of the solid immersion lens, a dividing means 110 for dividing incident light into a p-polarized light component and an s-polarized light component reflected by the beam splitter 102 and a photo-detecting means 120 for separately detecting the p-polarized light component and the s-polarized light component divided by the dividing means 110.

摘要翻译： 光学拾取装置和光学记录和再现装置适用于近场光学记录和再现系统。 光学拾取装置包括由固体浸没透镜（SIL）构成的物镜，物镜的数值孔径大于1;分束器102，用于反射p偏振光分量和s偏振光分量 当光学拾取装置通过物镜从光源以预定的偏振态以一束光线照射光记录介质时，检测来自光记录介质的反射光，以检测垂直于偏振态的偏振态的分量 当该光学记录介质的表面与固体浸没透镜（SIL）的平坦表面部分之间的距离为零时获得的反射光产生对应于光学记录介质的表面与平面部分之间的距离的信号 的固体浸没透镜，用于将入射光分解成p偏振光分量和s-pol的分割装置110 由分束器102反射的光分量的光分量和用于分别检测由分割装置110分割的p偏振光分量和s偏振光分量的光检测装置120。

公开(公告)号：US07206262B2

公开(公告)日：2007-04-17

申请号：US10487981

申请日：2003-01-07

申请人： Makoto Takasima

发明人： Makoto Takasima

IPC分类号： G11B7/00 ,  G11B11/00

CPC分类号： G11B11/10508 ,  G11B11/10534 ,  G11B11/10573 ,  G11B11/10576 ,  G11B11/10595

摘要： A moved distance detecting means (15) detects the moved distance in a tracking direction of an object lens, a position signal generating means (60) generates a position signal corresponding to the position of the object lens based on the detection, and a drive signal modulating means (40) modulates the drive current of a magnetic head (20) according to this position signal. Therefore, a drive current can be controlled according to the moved distance of the object lens to enable the magnetic head to be driven with a small current when a moved distance is small and with a large current according to a moved distance only when it is large, whereby it is possible to reduce an average drive current and hence reduce power consumption as a whole.

摘要翻译： 移动距离检测装置（15）检测物镜的跟踪方向上的移动距离，位置信号发生装置（60）根据检测产生对应于物镜的位置的位置信号，以及驱动信号 调制装置（40）根据该位置信号调制磁头（20）的驱动电流。 因此，可以根据物镜的移动距离来控制驱动电流，使得当移动距离小时能够以小电流驱动磁头，并且只有当大的电流大时才根据移动的距离使用大电流 ，从而可以降低平均驱动电流，从而整体上降低功耗。

公开(公告)号：US07116619B2

公开(公告)日：2006-10-03

申请号：US10521867

申请日：2003-06-26

申请人： Ole Klembt Andersen ,  Jacobus M. Den Hollander

发明人： Ole Klembt Andersen ,  Jacobus M. Den Hollander

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B11/10576

摘要： Tilt (θ(r, φ)) is measured in a measuring location (P(r, φ) optical disc (2). A pivotable objective lens (34) is brought to a first focus measuring location such as to focus a light beam (32) in a first anchor point (P1(r−Δr1, φ))having the same angular coordinate φ as said measuring location (P(r, φ)) and having a small radial distance Δr1 from said measuring location. The objective lens is brought to a second focus measuring location such as to focus the light beam in a second anchor point (P2(r+Δr2, φ)) having the same angular coordinate φ as said measuring location and having a small radial distance Δr2 from said measuring location, wherein said first and second anchor pints are located on opposite sides of said measuring location. Tilt in said measuring location is calculated from the coordinates of said two focus measuring locations of said objective lens.

摘要翻译： 在测量位置（P（r，phi））光盘（2）上测量倾斜（theta（r，phi））。可枢转物镜（34）被带到第一焦点测量位置， （P（r，phi））具有相同角度坐标phi并且具有距离所述测量位置的小的径向距离Deltar 1的第一锚点（P 1（r-Deltar 1，phi）） 将物镜带到第二焦点测量位置，以将光束聚焦在具有与所述测量位置相同的角坐标phi的第二锚定点（P 2（r + Deltar 2，phi））中，并且具有小的 从所述测量位置的径向距离Deltar 2，其中所述第一和第二锚定点位于所述测量位置的相对侧上。根据所述物镜的所述两个焦点测量位置的坐标来计算所述测量位置中的倾斜度。

公开(公告)号：US07106683B2

公开(公告)日：2006-09-12

申请号：US10415103

申请日：2002-08-27

申请人： Kimihiro Saito ,  Tsutomu Ishimoto

发明人： Kimihiro Saito ,  Tsutomu Ishimoto

IPC分类号： G11B7/135

CPC分类号： G11B11/10576 ,  B82Y10/00 ,  G11B7/0908 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/139 ,  G11B2007/13727

摘要： An optical pickup device includes an objective lens (2), with a numerical aperture (NA) being not less than 1, having a solid immersion lens (1) which is made up by a spherical portion (1a) and a flat portion (1b) parallel to a surface (101a) of an optical disc (101). The component of the reflected light from the optical disc in the polarized state perpendicular to the polarized state of the reflected light which prevails when the distance between the surface of the optical disc and the flat portion of the solid immersion lens is zero is detected. The so detected light intensity is associated with the distance between the optical disc surface and the solid immersion lens to accurately detect the minute gap between the optical disc and the solid immersion lens.

摘要翻译： 一种光学拾取装置，包括数值孔径（NA）不小于1的物镜（2），具有由球形部分（1a）和平坦部分（1a）构成的固体浸没透镜（1） 1b）平行于光盘（101）的表面（101a）。 检测到当光盘的表面与固体浸没透镜的平坦部分之间的距离为零时，偏光状态下的偏振状态的偏振状态的反射光的分量是反射光的偏振状态。 所检测到的光强度与光盘表面和固体浸没透镜之间的距离相关联，以准确地检测光盘和固体浸没透镜之间的微小间隙。

公开(公告)号：US07095687B2

公开(公告)日：2006-08-22

申请号：US11124071

申请日：2005-05-09

申请人： Noriaki Nishi

发明人： Noriaki Nishi

IPC分类号： G11B7/00

CPC分类号： G11B11/10543 ,  G11B7/00718 ,  G11B7/0912 ,  G11B7/123 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13927 ,  G11B7/1398 ,  G11B11/10576

摘要： An optical head in which focussing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetector device. The spot shape correcting unit corrects part or all of light spots formed on the photodetector by a light beam reflected back by the optical disc so that the spot diameter in a direction traversing a track on the optical disc will be larger than the spot diameter along the track.

摘要翻译： 一种光头，其中通过用于在光盘上记录和/或再现信息信号的光斑尺寸方法来检测聚焦误差。 光头包括用于校正物镜和光电检测器件之间的斑点形状的单元。 斑点形状校正单元通过由光盘反射回的光束校正在光电检测器上形成的光点的一部分或全部，使得沿着光盘上的轨道的方向上的光斑直径将大于沿着光盘的光点直径 跟踪。

公开(公告)号：US20060077830A1

公开(公告)日：2006-04-13

申请号：US11280558

申请日：2005-11-16

申请人： Toshikazu Kanaoka

发明人： Toshikazu Kanaoka

IPC分类号： G11B7/00 ,  G11B5/09

CPC分类号： G11B20/22 ,  G11B7/005 ,  G11B7/094 ,  G11B7/0956 ,  G11B7/1263 ,  G11B7/1267 ,  G11B11/10515 ,  G11B11/10576 ,  G11B11/10595 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/18 ,  G11B2020/1062 ,  G11B2020/1457

摘要： It is an object of the present invention to provide a data reproducer in which the quality of a reproduction signal is improved. A data reproducer of the present invention includes a phase-difference detecting section which obtains the cross correlation value between the head pattern in a track to be reproduced and a reproduction signal, synchronous detectors which respectively obtain the cross correlation value between the head pattern of a track adjacent to the track to be reproduced and the reproduction signal, and crosstalk value detector which obtains the direction and ratio of crosstalk in accordance with these cross correlation values. The data reproducer has a correcting function which corrects the offset and gain of a reproduction signal in accordance with a phase difference and cross correlation value obtained by the phase-difference detecting section.